(19)

(11)

EP 3 999 416 A1

(12)

(43) Date of publication: 25.05.2022 Bulletin 2022/21 (21) Application number: 20751195.7 (22) Date of filing: 17.07.2020

(51) International Patent Classification (IPC):  B64C 3/10(2006.01) B64C 27/26(2006.01) B64C 39/06(2006.01) B64C 27/08(2006.01) B64C 29/00(2006.01) B64C 39/08(2006.01) (52) Cooperative Patent Classification (CPC): B64C 2201/027; B64C 3/10; B64C 27/08; B64C 27/26; B64C 29/0016; B64C 29/0025; B64C 29/0033; B64C 39/068; B64C 2201/104; B64C 2201/108; B64C 39/08; Y02T 50/10 (86) International application number: PCT/GB2020/051716 (87) International publication number: WO 2021/009516 (21.01.2021 Gazette 2021/03)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 18.07.2019 GB 201910278 (71) Applicant: GKN Aerospace Services Limited Shirley, Solihull B90 8BG (GB)	(72) Inventor: DE GRAAFF, Arent-Jan 3351 LB Papendrecht (ZH) (NL) (74) Representative: D Young & Co LLP  120 Holborn London EC1N 2DY London EC1N 2DY (GB)